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                <h3 id="本文介绍了-Flex-布局"><a href="#本文介绍了-Flex-布局" class="headerlink" title="本文介绍了 Flex 布局"></a>本文介绍了 Flex 布局</h3><h4 id="成为弹性盒子"><a href="#成为弹性盒子" class="headerlink" title="成为弹性盒子"></a>成为弹性盒子</h4><pre class=" language-CSS"><code class="language-CSS">// 块级元素
display:flex;
// 行内元素
display:inline-flex;</code></pre>
<h4 id="容器-6-大属性"><a href="#容器-6-大属性" class="headerlink" title="容器 6 大属性"></a>容器 6 大属性</h4><h4 id="flex-direction-主轴方向"><a href="#flex-direction-主轴方向" class="headerlink" title="flex-direction(主轴方向)"></a>flex-direction(主轴方向)</h4><p>flex-direction:<strong>row</strong>(默认值-水平方向从左到右) / <strong>row-reverse</strong>(水平方向从右到左) / <strong>columns</strong> / <strong>columns-reverse</strong></p>
<p><img src="http://www.ruanyifeng.com/blogimg/asset/2015/bg2015071005.png" alt="flex-direction"></p>
<h4 id="flex-wrap-是否换行"><a href="#flex-wrap-是否换行" class="headerlink" title="flex-wrap(是否换行)"></a>flex-wrap(是否换行)</h4><p>flex-wrap:<strong>nowrap</strong>(默认值-不换行)/<strong>wrap</strong>(换行)/<strong>wrap-reverse</strong>(换行-反转)</p>
<h6 id="nowrap"><a href="#nowrap" class="headerlink" title="nowrap"></a>nowrap</h6><p><img src="http://www.ruanyifeng.com/blogimg/asset/2015/bg2015071007.png" alt="nowrap"></p>
<h6 id="wrap"><a href="#wrap" class="headerlink" title="wrap"></a>wrap</h6><p><img src="http://www.ruanyifeng.com/blogimg/asset/2015/bg2015071008.jpg" alt="wrap"></p>
<h6 id="wrap-reverse"><a href="#wrap-reverse" class="headerlink" title="wrap-reverse"></a>wrap-reverse</h6><p><img src="http://www.ruanyifeng.com/blogimg/asset/2015/bg2015071009.jpg" alt="wrap-reverse"></p>
<h6 id="flex-direction-和-flex-wrap-两属性的合写"><a href="#flex-direction-和-flex-wrap-两属性的合写" class="headerlink" title="flex-direction 和 flex-wrap 两属性的合写"></a>flex-direction 和 flex-wrap 两属性的合写</h6><p><strong>flex-flow</strong>: <strong>flex-direction</strong> || <strong>flex-wrap</strong> 默认值为 <strong>row</strong> || <strong>nowrap</strong>;</p>
<h4 id="justify-content-主轴的对齐方式"><a href="#justify-content-主轴的对齐方式" class="headerlink" title="justify-content(主轴的对齐方式)"></a>justify-content(主轴的对齐方式)</h4><p>justify-content: <strong>flex-start</strong>(左对齐) / <strong>flex-end</strong>(右对齐) / <strong>center</strong>(居中) / <strong>space-between</strong>(两端对齐，项目之间的间隔相等) / <strong>space-around</strong>(每个项目两侧间隔相等，项目之间的间隔比项目和边框之间的间隔大一倍)</p>
<p><img src="http://www.ruanyifeng.com/blogimg/asset/2015/bg2015071010.png" alt="justify-content"></p>
<h4 id="align-items-侧轴的对齐方式"><a href="#align-items-侧轴的对齐方式" class="headerlink" title="align-items(侧轴的对齐方式)"></a>align-items(侧轴的对齐方式)</h4><p>align-items: <strong>flex-start</strong> / <strong>flex-end</strong> / <strong>center</strong> / <strong>baseline</strong>(项目的第一行文字的基线对齐) / <strong>stretch</strong>(如果未设置高度或者高度为 auto,则高度填充满整个盒子)</p>
<p><img src="http://www.ruanyifeng.com/blogimg/asset/2015/bg2015071011.png" alt="align-items"></p>
<pre class=" language-CSS"><code class="language-CSS">.box &#123;
  align-items: flex-start | flex-end | center | baseline | stretch;
&#125;</code></pre>
<h4 id="align-content-定义了多根轴线的对齐方式。如果项目只有一根轴线，该属性不起作用"><a href="#align-content-定义了多根轴线的对齐方式。如果项目只有一根轴线，该属性不起作用" class="headerlink" title="align-content(定义了多根轴线的对齐方式。如果项目只有一根轴线，该属性不起作用)"></a>align-content(定义了多根轴线的对齐方式。如果项目只有一根轴线，该属性不起作用)</h4><p>align-content: <strong>flex-start</strong> / <strong>flex-end</strong> / <strong>center</strong> / <strong>space-between</strong> / <strong>space-around</strong> / <strong>stretch</strong><br>该属性用的比较少,在此不多赘述</p>
<pre class=" language-CSS"><code class="language-CSS">.box &#123;
  align-items: flex-start | flex-end | center | space-between  | space-around | stretch;
&#125;</code></pre>
<h4 id="项目-6-大属性"><a href="#项目-6-大属性" class="headerlink" title="项目 6 大属性"></a>项目 6 大属性</h4><ul>
<li>order(排序):数值越小,排序越靠前</li>
<li>flex-grow(放大):一般值均为数值</li>
<li>flex-shrink(缩小):一般值均为数值</li>
<li>flex-basis(在分配多余空间之前，项目占据的主轴空间(main size),默认值为 auto)</li>
<li>flex(是 flex-grow/flex-shrink/flex-basis 的合写):默认值为 0 1 auto</li>
<li>align-self(允许单个项目有与其他项目不一样的对齐方式，可覆盖 align-items 属性)</li>
</ul>
<h4 id="order-排序"><a href="#order-排序" class="headerlink" title="order(排序)"></a>order(排序)</h4><p>order:定义项目的排列顺序。数值越小，排列越前，默认为 0;</p>
<pre class=" language-CSS"><code class="language-CSS">.item &#123;
  order:number;
&#125;</code></pre>
<p><img src="https://i.loli.net/2021/08/10/vYgM9WEysa6rVLn.png" alt="order.png"></p>
<h4 id="flex-grow-放大"><a href="#flex-grow-放大" class="headerlink" title="flex-grow(放大)"></a>flex-grow(放大)</h4><p>flex-grow:定义为项目的放大比例，默认为 0</p>
<pre class=" language-CSS"><code class="language-CSS">.item &#123;
  flex-grow:number;
&#125;</code></pre>
<p><img src="https://i.loli.net/2021/08/10/YGuXdgfSJsV2xe6.png" alt="flex-grow.png"></p>
<h4 id="flex-shrink-缩小"><a href="#flex-shrink-缩小" class="headerlink" title="flex-shrink(缩小)"></a>flex-shrink(缩小)</h4><p>flex-shrink:定义了项目的缩小比例，默认为 0</p>
<pre class=" language-CSS"><code class="language-CSS">.item &#123;
  flex-shrink:number;
&#125;</code></pre>
<p><img src="https://i.loli.net/2021/08/10/8yRtnVYASQBJmTa.jpg" alt="flex-shrink.jpg"></p>
<h4 id="flex-basis-在分配多余空间之前，项目占据的主轴空间-main-size"><a href="#flex-basis-在分配多余空间之前，项目占据的主轴空间-main-size" class="headerlink" title="flex-basis(在分配多余空间之前，项目占据的主轴空间(main size))"></a>flex-basis(在分配多余空间之前，项目占据的主轴空间(main size))</h4><pre class=" language-CSS"><code class="language-CSS">.item &#123;
  flex-basis: length | auto; /* default auto */
&#125;</code></pre>
<p>它可以设为跟 width 或 height 属性一样的值（比如 350px），则项目将占据固定空间</p>
<h4 id="flex-flex-属性是-flex-grow-flex-shrink-flex-basis-的简写，默认值为-0-1-auto"><a href="#flex-flex-属性是-flex-grow-flex-shrink-flex-basis-的简写，默认值为-0-1-auto" class="headerlink" title="flex:flex 属性是 flex-grow / flex-shrink / flex-basis 的简写，默认值为 0 1 auto;"></a>flex:flex 属性是 flex-grow / flex-shrink / flex-basis 的简写，默认值为 0 1 auto;</h4><pre class=" language-CSS"><code class="language-CSS">.item &#123;
  flex:flex-grow / flex-shrink / flex-basis;
&#125;</code></pre>
<h4 id="align-self-属性定义了单个项目允许和其他项目不一样的对齐方式，默认值为-auto"><a href="#align-self-属性定义了单个项目允许和其他项目不一样的对齐方式，默认值为-auto" class="headerlink" title="align-self:属性定义了单个项目允许和其他项目不一样的对齐方式，默认值为 auto;"></a>align-self:属性定义了单个项目允许和其他项目不一样的对齐方式，默认值为 auto;</h4><pre class=" language-CSS"><code class="language-CSS">.item &#123;
  align-self: auto | flex-start | flex-end | center | baseline | stretch;
&#125;</code></pre>
<p><img src="https://i.loli.net/2021/08/10/8uhEYx9TVjgvpaX.png" alt="align-self"></p>
<p>2021.8.10 复习<br>flex:<br>display:flex/inline-flex<br>flex-direction:row/row-reverse/columns/columns-reverse<br>flex-wrap:wrap/nowrap/wrap-reverse<br>justify-content:flex-start/flex-end/start/space-between/space-around<br>align-items:flex-start/flex-end/center/stretch/(还有一个值忘记了)<br>align-contents:多根轴线的对齐方式,一般很少用</p>
<p>items6 大属性<br>order：排序<br>flex-grow:放大<br>flex-shrink:缩小<br>flex-basis:分配多余空间时候,在主轴占用的 width<br>flex(上面三个属性的合写)<br>algin-self:单个项目允许与其他项目不同的对齐方式</p>

                
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